My wife's parents drink every night, sometimes more than just a few...My kids have known that I smoked cigs their entire life. My kids also know that when I was a teen, I did worse things. And yet, they grew up and they don't smoke, don't do drugs, and don't drink. My daughter always says that she and her brothers should get a free pass for anything they do since what they do is nothing compared to the stuff that I've done when I was young.
My wife's brother and sister don't drink at all, and never have.
They are in their forties now.
My wife rarely drinks, although sometimes I wish she would drink a little more often.